Alex Mustard / Killer whales (Orcinus orca) at the surface in an Arctic fjord in Spildra, northern Norway, with sea birds. Arctic Ocean

Alex Mustard / California sea lion (Zalophus californianus) pups in an underwater cave. Los Islotes, La Paz, Baja California Sur, Mexico. Sea of Cortez, Gulf of California, East Pacific Ocean.

Alex Mustard / Veined octopus (Amphioctopus marginatus) shelters inside an old clam shell, with silver-sides in the water above. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Alex Mustard / Whitemargin stargazer (Uranoscopus sulphureus) sets an ambush in the sand at night. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Alex Mustard / Veined octopus (Amphioctopus marginatus) emerging from its home in an old clam shell. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Stefan Christmann / Member of BBC Dynasties crew photographing on sea ice in light of full moon, during polar night. Atka Bay, Antarctica. July 2017.

Stefan Christmann / Cameraman Lindsay McCrae on ice overlooking Southern Ocean, filming for BBC Dynasties Penguin programme. Atka Bay, Antarctica. March 2017.

Stefan Christmann / Cameraman Lindsay McCrae on sea ice filming frozen landscape and icebergfor BBC Dynasties Penguin programme. Atka Bay, Antarctica. October 2017.

Stefan Christmann / Cameraman Lindsay McCrae filming Emperor penguin (Aptenodytes forsteri) colony for BBC Dynasties Penguin programme. Chicks are on sea ice whilst parents fish at sea. Atka Bay, Antarctica. December 201...

Franco Banfi / Diver exploring an iceberg in Greenland Sea. Tasiilaq, East Greenland. April 2018.

Franco Banfi / Diver exploring around an iceberg. Tasiilaq, East Greenland. April, 2018. Ocean Photographer of the Year 2023 - Third place Adventure category.

David Fleetham / Clark's anemonefish (Amphiprion clarkii), pair tending to egg mass placed beside the protection of an anemone. Yap, Micronesia.

John Waters / Slow motion clip of a Brown trout (Salmo trutta) breaching to predate an adult Mayfly (Ephemoptera) emerged on the surface, River Kennet, Hungerford, Berkshire, England, UK, June.

John Waters / Slow motion clip of a Brown trout (Salmo trutta) predating an adult Mayfly (Ephemoptera) struggling to take off from water, River Kennet, Hungerford, Berkshire, England, UK, June.

David Fleetham / Hawaiian pom-pom / boxer crab (Lybia edmondsoni)with anemones (Triactis sp) that it carries around holding with the claws and using them for defense, waving in front of the possible aggressor. An exam...

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) killing tuna. A group of the sea lion bulls have learnt to herd Pelagic yellowfin tuna into a small cove, trapping them. The fish often leap ashore in an effor...

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) hunting tuna. A group of the sea lion bulls have learnt to herd Pelagic yellowfin tuna into a small cove, trapping them. The fish often leap ashore in an effor...

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) hunting tuna. A group of the sea lion bulls have learnt to herd Pelagic yellowfin tuna into a small cove, trapping them. The fish often leap ashore in an effor...

Alex Mustard / Schools of Pacific creolefish (Cephalopholis colonus) and Panamic sergeant major (Abudefduf troschelii) swimming through sun beams inside an underwater cavern. Los Islotes, La Paz, Baja California Sur...

Frederique Olivier / Emperor penguin (Aptenodytes forsteri) tobogganing on an iceberg at sunset and diving from the edge, seen from a moving boat, Antarctica.

Ingo Arndt / Olive ridley sea turtles (Lepidochelys olivacea) digging their nests by night with stars during an arribada (mass nesting event) to lay eggs, Pacific Coast, Ostional, Costa Rica.

Ingo Arndt / Olive ridley sea turtles (Lepidochelys olivacea) females coming ashore at twilight during an arribada (mass nesting event) to lay eggs, Pacific Coast, Ostional, Costa Rica.

Ingo Arndt / Olive ridley sea turtles (Lepidochelys olivacea) females coming ashore during an arribada (mass nesting event) to lay eggs, Pacific Coast, Ostional, Costa Rica.

Ingo Arndt / "CTD" (instrument for collecting water samples from all water depths) at work 50 km from the ice floe base. ISPOL (ICE Station Polarstern) Expedition 2004/2005 from Alfred Wegener Institute; Bremerhav...

Ingo Arndt / Researcher Gerhard Dieckmann checking samples from sediment trap. ISPOL (ICE Station Polarstern) Expedition 2004/2005 from Alfred Wegener Institute, Bremerhaven, Germany. The Icebreaker Polarstern was...

Ingo Arndt / Crack in ice floe in front of icebreaker ship Polarstern. ISPOL (ICE Station Polarstern) Expedition 2004/2005 from Alfred Wegener Institute, Bremerhaven, Germany. The Icebreaker Polarstern was driftin...

Ingo Arndt / Graphic from "ice thickness profile" of the (ISPOL) ice floe. ISPOL (ICE Station Polarstern) Expedition 2004/2005 from Alfred Wegener Institute, Bremerhaven, Germany. The Icebreaker Polarstern was dri...

Ingo Arndt / Samples from sediment trap. ISPOL (ICE Station Polarstern) Expedition 2004/2005 from Alfred Wegener Institute, Bremerhaven, Germany. The Icebreaker Polarstern was drifting for five weeks with an ice f...

Ingo Arndt / Researcher Hauke Flores watching for birds and seals from the top of Icebreaker Polarstern. ISPOL (ICE Station Polarstern) Expedition 2004/2005 from Alfred Wegener Institute, Bremerhaven, Germany. The...

Alex Mustard / Veined octopus (Amphioctopus marginatus) sheltering in an old clam shell, with plankton swirling around it at night (captured as trails in the long exposure). Bitung, North Sulawesi, Indonesia. Lembeh...

Eric Baccega / Polar bear (Ursus maritimus) swimming in front of an iceberg, Arctic Bay, Baffin Island, Nunavut, Canada, June.

Alex Mustard / Brandt's cormorant (Phalacrocorax penicillatus) hunts for a meal in a school of Pacific chub mackerel (Scomber japonicus) beneath an oil rig. Eureka Rig, Los Angeles, California, USA, September

Alex Mustard / California sea lion (Zalophus californianus) adult female swimming through sunbeams in an underwater cave. Los Isotes, La Paz, Mexico. Sea of Cortez, East Pacific Ocean.

Tony Wu / Four Sperm whales (Physeter macrocephalus) rubbing their heads together while socializing, forming an X shape pattern. Caribbean.

Claudio Contreras / Aerial view of Red mangrove (Rhizophora mangle) coastal lagoon, Sian Ka'an Biosphere Reserve, Caribbean Sea, Mexico, January

Alex Mustard / Group of predators hunting together, in an example of 'Nuclear foraging'. The Moray eel (Gymnothorax javanicus) flushes out prey, and is followed by a Napolean wrasse (Cheilinus undulatus) and a Bluef...

Pascal Kobeh / Divers are setting up concrete reef balls to build an artificial reef, Philippines, Sulu Sea. August 2014.

Jordi Chias / Loggerhead turtle (Caretta caretta) trapped in an abandoned drifting net, Balearic Channel, Mediterranean sea.

Jordi Chias / Loggerhead turtle (Caretta caretta) trapped in an abandoned drifting net, Balearic Channel, Mediterranean sea.

John Cancalosi / Cross-Section of Utah Septarian Nodule, Utah. A type of geode, Utah Septarian Nodules are found about 15 miles east of Zion National park. They were formed in an ancient sea floor during the Cretaceou...

Merryn Thomas / Man taking a photograph of Three Cliffs Bay, Gower, Swansea, Wales. January 2013. Model released.

Michael Pitts / Cameraman Michael Pitts filming Green turtle (Chelonia mydas) Karan Island. Arabian Gulf, June 2009

Roland Seitre / Olive Ridley Sea Turtle (Lepidochelys olivacea) females coming ashore to lay eggs during an arribada nesting event, Ostional Beach, Costa Rica

Ingo Arndt / Olive Ridley Sea Turtle (Lepidochelys olivacea) females coming ashore to lay eggs during an arribada nesting event, Ostional Beach, Costa Rica

Denis-Huot / Bottlenose dolphin (Tursiops truncatus) playing in the waves of an oil tanker, Port Aransas, Texas, USA

Michele Westmorland / Man collecting black sand in an area which is one of the locations for producing fine restaurant quality salt, most of which is shipped to Japan, Kusimbi Beach, Bali, Indonesia 2009. No release availa...

David Tipling / Kapitan Klebnikov, an ice breaker, growing through ice in the Weddell Sea near Snow Hill Island, Antarctica, November 2006

Kerstin Hinze / Aerial view of Mark, an offshore windpark, Ostsee, Denmark, July 2012

Juan Carlos Munoz / Aerial view of sandbanks off an island of the Bahamas archipelago, Caribbean, February 2012

Brent Stephenson / A cruise ship heads back up the Beagle Channel towards Ushuaia at the end of an Antarctic cruise. Beagle Channel, Tierra del Fuego Archipelago, South America, December.

Pete Oxford / Two Common Bottlenose Dolphin (Tursiops truncatus) in shallow water. Punta Allen, Sian Ka'an Biosphere Reserve, Quintana Roo, Yucatan Peninsula, Mexico.

Juergen Freund / Details of mouth of an anemone, Kimbe Bay, West New Britain, Papua New Guinea.

Juergen Freund / Imperial / Emperor shrimp (Periclimenes imperator / Zenopontonia rex) on an Eyed / Leopard sea cucumber (Bohadschia argus). Lembeh Strait, North Sulawesi, Indonesia

Juergen Freund / Imperial / Emperor shrimp (Periclimenes imperator / Zenopontonia rex) on an Eyed / Leopard sea cucumber (Bohadschia argus). Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Newly harvested Mangrove timber getting cleaned in the sea. The red bark has been taken off causing an orange red tint in the shallow water. Raja Ampat, West Papua, Indonesia, February 2010

Chris Gomersall / 2020VISION / Sooty shearwater (Puffinus griseus) adult in flight over Irish sea off Pembrokeshire coast, Wales, UK, August 2010. Did you know? Hitchcock's film 'The Birds' was partly inspired by an incident in Mon...

Alex Mustard / A young California sealion (Zalophus californianus) portrait, inside an underwater cave. Los Isotes, La Paz, Mexico. Sea of Cortez, East Pacific Ocean.

Alex Mustard / A young California sealion (Zalophus californianus) playing with a starfish, inside an underwater cave. The pups will pick up a variety of objects (such as starfish, lumps of coral, shells and feather...

Alex Mustard / A young California sealion (Zalophus californianus) playing with a starfish, inside an underwater cave. The pups will pick up a variety of objects (such as starfish, lumps of coral, shells and feather...

Alex Mustard / An adult California sealion (Zalophus californianus) makes a sharp turn at high speed. Los Islotes, La Paz, Baja California, Mexico. Sea of Cortez, East Pacific Ocean.

Alex Mustard / A young Grey Seal (Halichoerus grypus) above kelp in the Farne Islands. This seal has an orange snout from foraging on a rusty ship wreck. Northumberland, England, UK. North Sea. August

Alex Mustard / An Australian Sea Lion (Neophoca cinerea) bathing in the sun at the surface. Kangaroo Island, South Australia, Australia. Southern Ocean. November

Alex Mustard / An adult female California sea lion (Zalophus californianus) head portrait, in a rocky underwater cave. La Paz, Baja California Mexico. Sea of Cortez, East Pacific Ocean. October

Eric Baccega / View from deck of a cruise ship cruising along Baffin Island with an iceberg emerging out ot the mist, Nunavut, Canada, August 2010

Solvin Zankl / An Olive ridley sea turtle hatchling (Lepidochelys olivacea) on its way to the sea. The hatchlings orientate themselves by the brightness of the horizon above the ocean, Ostional NP, Costa Rica. Octob...

Solvin Zankl / Female Olive ridley sea turtle (Lepidochelys olivacea) swimming from the open ocean towards the beach of Ostional, Costa Rica, Pacific Ocean to gather for an arribada (mass nesting event). November

Solvin Zankl / Mature female Olive ridley sea turtles (Lepidochelys olivacea) arriving on the beach of Ostional, Costa Rica, Pacific coast, during an arribada / mass nesting event, November

Solvin Zankl / The arrival of many Olive ridley sea turtles (Lepidochelys olivacea) at the beach of Ostional, Costa Rica, Pacific coast, at the beginning of an arribada (mass nesting event) November ^^^ Thousands an...

Solvin Zankl / These hatchlings of an Olive ridley sea turtle (Lepidochelys olivacea) should be buried and protected under 40 cm of warm sand, but a domestic dog dug them out at Ostional beach in Costa Rica. Novembe...

Solvin Zankl / After an incubation period of 45 to 55 days and several days long ascent through the sand the hatchling Olive ridley turtles (Lepidochelys olivacea) emerge all together. Ostional Beach, Costa Rica, No...

Wild Wonders of Europe / della Ferrera / Juvenile White tailed eagle (Haliaeetus albicilla) in an Slovenian / Common oak (Quercus robur) forest, Lonjsko Polje Nature Park, Ramsar Site, Sisack-Moslavina county, Slavonia region, Posavina area,...

Wild Wonders of Europe / Banfi / Striped blenny (Parablennius rouxi) looking out of an encrusting sponge covered hole, Larvotto Marine Reserve, Monaco, Mediterranean Sea, July 2009

Wild Wonders of Europe / Campbell / Rear view of visitors and local people watching Bottlenosed dolphins (Tursiops truncatus) on an incoming tide at Chanonry Point, Moray Firth, Nr Inverness, Scotland, July 2009

Wild Wonders of Europe / Widstrand / White tailed sea eagle (Haliaeetus albicilla) in flight silhouetted against an orange sky, Flatanger, Nord Trndelag, Norway, August 2008

Steven Kazlowski / Polar bear (Ursus maritimus) cub chases an Arctic fox (Vulpes / Alopex lagopus) on the pack ice to practice its hunting skills, 1002 area of the Arctic National Wildlife Refuge, Beaufort Sea, Alaska,...

Steven Kazlowski / An Inupiaq whaling crew prepare to paddle their seal skin boat / umiak, in an open lead in the Chukchi Sea, during spring whaling season, off the Arctic coastal village of Point Hope, Alaska, May 2008

Steven Kazlowski / An Inupiaq whaling crew paddle their seal skin boat / umiak, in an open lead in the Chukchi Sea, during spring whaling season, off the Arctic coastal village of Point Hope, Alaska, May 2008

Steven Kazlowski / Cape Thompson and an open lead in the pack ice, blown open by strong winds, indicating thinning sea ice conditions, 26 miles south of Point Hope, Arctic coast of Alaska, March 2008

Wild Wonders of Europe / Lundgren / Dahlia anemone (Urticina felina) close-up, with an Amphipod, Saltstraumen, Bod, Norway, October 2008

Steven Kazlowski / Polar bear (Ursus maritimus) hunting a Bearded seal {Erignathus barbatus} resting on an iceberg in the Beaufort Sea, Arctic Ocean, Alaska

Steven Kazlowski / Polar bear (Ursus maritimus) swimming in the water in front of an iceberg, Beaufort Sea, Arctic Ocean, Alaska

Steven Kazlowski / Polar bear (Ursus maritimus) standing on top of an iceberg floating in the Beaufort Sea, Arctic Ocean, Alaska

Steven Kazlowski / Polar bear (Ursus maritimus) climbing onto an iceberg with Arctic terns {Sterna paradisaea} flying overhead, Beaufort Sea, Arctic Ocean, Alaska

Steven Kazlowski / Polar bear (Ursus maritimus) walking across an iceberg at dawn, yawning its discomfort, Beaufort Sea, Arctic Ocean

Andrew Parkinson / Grey seal {Halichoerus grypus} as an adult female bounds toward the sea she is momentarily raised off the ground on just its flippers. Lincolnshire, UK

Solvin Zankl / Murrays abyssal anglerfish (Melanocetus murrayi) Atlantic ocean. A deep-sea fish with bioluminescent lure used to attract prey. The bioluminescence is produced by symbiotic bacteria; these bacteria ar...

Flip Nicklin / Blue Whale (Balaenoptera musculus) aerial view of an 80 foot individual, Sea of Cortez, Mexico

Fred Bavendam / Common Comet Star (Linckia guildingii) in an unusual lavender color variation, it is typically beige or yellowish in color, Manado, North Sulawesi, Indonesia

Fred Bavendam / West Indian Manatee (Trichechus manatus) eating Hydrilla (Hydrilla sp) an introduced plant that often clogs waterways, Blue Spring State Park, Florida

Alex Mustard / Bluestreak cleaner wrasse (Labroides dimidiatus) cleans among the sharp teeth of a predatory roving coral grouper (Plectropomus pessuliferus) beneath an overhang on a coral reef. Ras Mohammed National...

Alex Mustard / Hard coral reef (Porites sp.) exposed by a low spring tide in front of an island. Yillet Island, Misool, Raja Ampat, West Papua, Indonesia. Ceram Sea. Tropical West Pacific Ocean.

Alex Mustard / Pair of pygmy lemon gobies (Lubricogobius exiguus) make their home in an old heart urchin (Maretia sp.) test. Dauin, Dauin Marine Protected Area, Dumaguete, Negros, Philippines. Bohol Sea, tropical we...

Ashley Cooper / Woman taking polar plunge in 2 degrees C water off an Antarctic cruise ship into sea. Antarctic Peninsula, Antarctica. February 2019.